In a state of plenty or comfort; sumptuously, luxuriously. Chiefly with live; see also to live well at live, v.1 phrases 1.

In a favourable or comfortable financial situation; with enough money to afford a good standard of living; in a position characterized variously…

Originally Australian. So as to be well established; in favourable or comfortable circumstances; spec. (Australian) = well off, adv. 3 (cf. sense B.).